North Pocono High School

Transcription

1 Building System Integration Energy and Cost Analysis Architectural Engineering Senior Thesis Presentation Pennsylvania State University

2 Presentation Outline Project Outline Existing System Design Conditions Air Side System Hydronic System ASHRAE Standards Standard 90.1 Standard 62.1 System Redesign Redesign Objectives Sizing the Ground Loop Ground Source Heat Pump Dedicated Outdoor Air System System Comparison Energy Comparison Cost Comparison Environmental Comparison Structural Breadth Load Comparison Member Comparison Cost Comparison Electrical Breadth

3 Project Outline Project Location: Covington Township, PA Delivery Method: Design Bid Build Design Base Bid: $30 Million Construction Dates: July 2007 Sept Project Size: 3 Levels 230,000 ft 2

4 Presentation Outline Project Outline Existing System Design Criteria Air Side System Hydronic System

5 Existing Conditions Design Criteria: Restrained by Budget Follow the 2005 International Code Design Conditions: Indoor Design Conditions Outdoor Design Conditions Cooling DBT 72 o F Latitude o Heating DBT 72 of Longitude o Relative Humidity 50 % Elevation 550 ft Cooling Design DBT 87 of Heating Design DBT 5 o F

6 Existing Conditions Air Side System 16 Direct Expansion Rooftop Air Handlers 12 VAV AHU with Duct Mounted Hot Water Coils 100 VAV Box Reheat Coils

7 Existing Conditions Air Side System 16 Direct Expansion Rooftop Air Handlers 4 CV AHU with Hot Water Coils Condition: Auditorium 2 Multi Use Space Locker Room Area

8 Existing Conditions Hydronic System 2 7,000 MBH Oil Fired Boilers Heating Coils in the AHU Reheat Coils in the VAV Terminal Units Boiler 1 Chemical Treatment Pumps Return Water Supply Water Boiler 2 Air Separator Expansion Tanks

9 Presentation Outline Project Outline Existing System Design Conditions Air Side System Hydronic System ASHRAE Standards Standard 90.1 Standard 62.1

10 ASHRAE Standards ASHRAE Standard 90.1 Building Envelope Fenestration is <40% of Total Enclosure Opaque Surfaces Element Insulation R Value Standard Min. R Value Compliant Assembly U Value Assembly Max. U Value Compliant Roof No No Wall Type No Yes Wall Type No No Slab on Grade NR NR NR Yes Fenestration Assembly U Assembly Assembly Fenestration Max SHGC Compliant Value Max. U Value SHGC Metal Framing No

11 ASHRAE Standards ASHRAE Standard 90.1 Building Equipment Building Area >25,000 ft 2 Air Handler Compliancy Unit Air Flow (cfm) CFM* Fan HP Complaint AHU 1 15, No AHU 2 16, No AHU 3 36, Yes AHU 4 3, Yes AHU 5 6, No AHU 6 19, Yes AHU 7 13, Yes AHU 8 12, No AHU 9 14, No AHU 10 8, No AHU 11 3, No AHU 12 3, NA NA AHU 13 18, No AHU 14 10, Yes AHU 15 15, No AHU 16 3, No

12 ASHRAE Standards ASHRAE Standard 62.1 Label ASHREA Standard Designer Value (cfm) (cfm) AHU 1 4,195 4,355 AHU 2 5,025 7,360 AHU 3 4,810 10,270 AHU 5 2,750 3,860 AHU 6 2,865 19,500 AHU 7 4,525 4,800 AHU 8 3,895 4,315 AHU 9 5,370 6,225 AHU 10 1,670 3,685 AHU ,000 AHU 12 2,400 2,255 AHU 13 5,105 10,725 AHU 14 1,985 2,470 AHU 15 3,950 5,890 AHU ,000 Total 49,480 91,710 Difference 42,230

13 Presentation Outline Project Outline Existing System Design Conditions Air Side System Hydronic System ASHRAE Standards Standard 90.1 Standard 62.1 System Redesign Redesign Objectives Sizing the Ground Loop Ground Source Heat Pump Dedicated Outdoor Air System

14 System Redesign Redesign Objectives Lower Energy Use Lower Life Cycle Cost Lower Emissions

15 System Redesign Dedicated Outdoor Air System (DOAS) 15 DOAS Units Replaced 15 DX AHU Saved Energy Saved in Operating Cost Ground Source Heat Pumps (GSHP) Sized to Handle the Majority of the Sensible Load 3 Different Models were Selected

16 System Redesign DOAS ASHRAE Standard 90.1 DOAS Compliancy Unit Air Flow CFM*0.001 (cfm) 5 Fan HP Compliant DOAS 1 4, Yes DOAS 2 4, Yes DOAS 3 4, Yes DOAS 5 2, Yes DOAS 6 2, Yes DOAS 7 4, Yes DOAS 8 3, Yes DOAS 9 4, Yes DOAS 10 1, Yes DOAS Yes DOAS 12 2, Yes DOAS 13 5, Yes DOAS 14 1, Yes DOAS 15 3, Yes

17 System Redesign Sizing the Ground Loop Building Heat Gains and Losses Hours Heat Losses (MBh) Heat Gains (MBh) 8 a.m. Noon Noon 4 p.m p.m. 8 p.m p.m. 8 a.m. 0 0

18 System Redesign Sizing the Ground Loop Piping Properties Ground Properties

19 System Redesign Sizing the Ground Loop Ground Loop Layout and Location Vertical Closed Loop 30 rows x 35 loops with 8 bores per a loop 140,000 ft 2

20 System Redesign Ground Loop Performance Heating Capacity 3,200 MBH Heating Needed 5,100 MBH Ground Loop Boiler Conditioned spaces

21 System Redesign GSHP Selection Classroom Spaces Console Water Source Heat Pumps Dedicated Outdoor Air Ceiling Diffusers Carrier s Console Model Typical Classroom Space Console Heat Pump

22 System Redesign GSHP Selection Gymnasium Auditorium Carrier s Rooftop Heat Pump Administrative Area Cafeteria Carrier s Packaged Heat Pump

23 Presentation Outline Project Outline Existing System Design Conditions Air Side System Hydronic System ASHRAE Standards Standard 90.1 Standard 62.1 System Redesign Redesign Objectives Sizing the Ground Loop Ground Source Heat Pump Dedicated Outdoor Air System System Comparison Energy Comparison Cost Comparison Environmental Comparison

24 System Comparison Energy Comparison 35,000,000 Energy Consumption Per Year 30,000,000 25,000,000 kbtu/yr 20,000,000 15,000,000 10,000,000 Current System New System 5,000,000 0 Total Building Energy Total Source Energy 75% Reduction In Building Energy 63% Reduction In Source Energy

25 System Comparison Cost Comparison Total Utility Cost per Year Initial Cost $300,000 Column1 Cost ($) Yearly Total $250,000 $200,000 $150,000 $100,000 $279,972 New Cost 50,291,756 Original Initial Cost 4,300,000 Difference 45,991,756 $50,000 $0 $92,533 Current System New System New System Saves $187.4 Thousand Current System $1.30/ft 2 yr New System $0.43/ft 2 yr

26 System Comparison Environmental Comparison CO 2 Yearly Emissions SO 2 and NO x Yearly Emissions 6,000,000 50,000 lbm/yr 5,000,000 4,000,000 3,000,000 2,000,000 1,000,000 gm/yr 45,000 40,000 35,000 30,000 25,000 20,000 15,000 Current System New System 0 Current System New System 10,000 5,000 0 SO2 NOx Total Emissions Reduced by 75%

27 Presentation Outline Project Outline Existing System Design Conditions Air Side System Hydronic System ASHRAE Standards Standard 90.1 Standard 62.1 System Redesign Redesign Objectives Sizing the Ground Loop Ground Source Heat Pump Dedicated Outdoor Air System System Comparison Energy Comparison Cost Comparison Environmental Comparison Structural Breadth Load Comparison Member Comparison Cost Comparison

28 Structural Breadth Roof Structure Non Composite gauge steel deck 7.0 psf Supported by Steel Joists Joists Bear on 8 CMU Walls

29 Structural Breadth Load Comparison Controlling Snow Load 39 psf Unit CURRENT ROOF LOADS Weight (lbs) Weight (lbs/ft 2 ) Unit REDESIGNED ROOF LOADS Weight (lbs) Weight (lbs/ft 2 ) AHU 1 8, DOAS 1 4, AHU 2 9, DOAS 2 4, AHU 3 23, DOAS 3 5, AHU 4 2, AHU 4 2, AHU 5 4, DOAS 5 3, AHU 6 12, DOAS 6 3, AHU 7 6, DOAS 7 4, AHU 8 5, DOAS 8 3, AHU 9 8, DOAS 9 4, AHU 10 4, DOAS 10 3, AHU 11 4, DOAS 11 2, AHU 12 1, DOAS 12 2, AHU 13 9, DOAS 13 5, AHU 14 4, DOAS 14 3, AHU 15 8, DOAS 15 3, AHU 16 4, RTG 1 (3) 1, CU 2a 4, RTG 2 (2) 1, CU 2b 4, x x x CU 3 3, x x x CU x x x CU x x x CU x x x Total 135, Totals 62, % Reduction in Weight

30 Structural Breadth Equipment Location Current Locations Redesigned Locations

31 Structural Breadth Member Comparison Joist Comparison Section Joist Span Joist Spacing Current Joist Redesigned Joist Section 1 29' 4" 5' 2" 22K9 16K2 Section 2 34' 8" 5' 8" 24K9 18K3 13' 1" 5' 6" 16KCS3 10K1 Section3 13' 0" 5' 10 1/8" 12K3 10K1 34' 8" 5' 7 1/2" 24k9 26k6 13' 4" 5' 0" 16KCS3 10K1 Section 4 38' 0" 5' 7 1/2" 24K9 28k6 13' 0" 5' 10 1/8" 12K3 10K1 13' 0" 5' 4" 16KCS3 10K1 11' 4" 4' 9" 16KCS3 10K1 10' 0" 4 9" 12K5 10K1 43' 8" 5' 6 1/2" 28K12 30K9 10' 8" 6' 2" 12K3 10K1 25' 8" 5' 7 1/2" 20K6 24K4 Section 5 13' 0" 5' 10 3/4" 12K3 10K1 34' 4" 5' 9" 24K9 22K4

32 Structural Breadth Cost Comparison $250, Material and Construction Cost $200, $150, $100, $50, $0.00 Current System New System New System saves 17% of the Initial Cost

33 Presentation Outline Project Outline Existing System Design Conditions Air Side System Hydronic System ASHRAE Standards Standard 90.1 Standard 62.1 System Redesign Redesign Objectives Sizing the Ground Loop Ground Source Heat Pump Dedicated Outdoor Air System System Comparison Energy Comparison Cost Comparison Environmental Comparison Structural Breadth Load Comparison Member Comparison Cost Comparison Electrical Breadth

34 Electrical Breadth Electrical Load Comparison Current Electrical Data Equipment Amps KVA AHU AHU AHU AHU AHU AHU AHU AHU AHU AHU AHU AHU AHU AHU AHU Pump Pump Pump Boiler Boiler CU 2a CU 2b CU CU CU Total New Electrical Data Equipment Amps KVA DOAS DOAS DOAS DOAS DOAS DOAS DOAS DOAS DOAS DOAS DOAS DOAS DOAS DOAS Pump Pump RTG 1a RTG 1b RTG 1c RTG 2a RTG 2b Total % Reduction in Amps 55% Reduction in KVA

35 Electrical Breadth Current Main Panel Redesigned Main Panel

36 Conclusions $46 Million Increase in First Cost $187.4 Thousand in Utility Savings Yearly Energy Consumption Reduced by 75% Building Emissions Reduced by 75% 17% Material and Construction Cost for Smaller Roof Structure Electrical Consumption was Reduced by 55%

37 Acknowledgments North Pocono School District Crabtree Rohrbaugh Assoc. Greenman and Pedersen Inc. Penn State AE Faculty

38 Thank You Questions?